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J. ELLMAUER.

REFRIGERATING APPARATUS.

APPLICATION FILED OCT. 27, I919- m ma Feb-22, 1921.

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FIG. 1 53 51W J l ZMW J. ELLMAUER.

REFRIGERATING APPARATUS- APPLICATION FILED 001. 21. 1919.

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INVENTOR ATTORNEY.

UNITED STATES 'lhl.

JOSEF ELLMAUER, 0F MILWAUKEE, WISCONSIN, ASSIGNOR, BY ASSIGIL MENTS, T0REFRIGO CORPORATION, 013 MILWAUKEE, WI$CONSIN, A CORPORA- TION OFWISCONSIN.

i REFRIGERATING APPARATUS.

To all whom it may concern:

Be it known that I, J osnr ELLMAUER, a citizen of the United States ofAmerica, residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have in vented certain new and useful Improvements inRefrigerating Apparatus, of which the following is a specification.

The primary'object of the invention is the provision of a combinedcompressor and condenser of compact form adapted for employment in arefrigerating plant and having a water cooling system for both of thprimary elements of the machine.

A further object of the invention is to provide a compressor andcondenser for the refrigerating fluid of a plant, combining these twomachines in a single compact structure thatis comparativelyeasy andinexpensive to manufacture in any desired size or capacity to suit therequirements of the installation, the structure providing a moreeconomical machine performing all the functions of a separate compressorand condenser as ordinarily positioned in the pipe line of a'refrigerating system between the expansion coils and the expansionvalve.

With these general objects in view the invention consists of the novelcombination and arrangement of parts hereinafter more fully described inconnectionwith the accompanyingdrawings and in which like referencecharacters designate corresponding parts throughout the several views.

In thedrawings,

Figure 1 is a side elevational View of the invention and 1 Fig. 2 is avertical central sectional view thereof.

Referring more in detail to the drawings, my machine consists of anupright casing 10 having a centrally positioned compressor cylinder 11therein with. the lower portion of the casing 10 constituting the crankcase of thecompressor with the reciprocating piston 12 of said cylinderconnected by rod 13 to the crank shaft 14 journaled through the chamber15 of thecrank case. The casing 10' is mounted upon a suitable base 16,

Specification of Letters Patent.

Patented Feb. 22, 1921.

Application filed October 27, 1919. Serial No. 333,811.

21 of a suitable motor, such as the electric motor 22 also mounted uponthe base 16.

The refrigerating fluid coming from the expansion coils of therefrigerating plant enters a scale separator 23 by means of a pipe 24.The separator 23 is preferably formed integral with a receiver 25positioned therebeneath, the combined separator and receiver beingfirmly secured to one side of the casing 10. A water conduit 26 passeshorizontally through the chamber 27 of the receiver 25 the cooling waterbeing admitted by an inlet pipe 28. The water flows through the conduit26 to an annular water space 29 surrounding the compressor cylinder 11,a passage 30 in the side of the casing 10 registering with the conduit26 admitting water into a side portion 31 of the cooling chamber 29. 7

An outlet pipe 32 in the detachable top 33 of the casing 10 affordsmeans for conduct ing the water from the chamber 29 it being understoodthat the cooling water is adapted to be circulated in any usual manner.An annular condenser chamber 34 for the refrigerant operated upon by thecompressor surrounds the water chamber or cooling jacket 29 of themachine, this condenser chamber being connected to the receiver chamber27 by registering ports 35 and 36 in corresponding side portions of thecasing 10 and receiver 25 respectively. The compressed and condensedrefrigerant leaves the the machine, the conduit 26 serving to cool therefrigerant within the chamber 27.

A tubular screen 38 in the chamber 39 of the scale separator 23 extendsbetween the top plateAEO of the separator and an outlet nozzle 41 forthe refrigerant axially projecting upwardly within the separator 23. Therefrigerant from the expansion coil passes through the pipe 24: into theseparator chamber 39 and through the screen 38 into the nozzle 41, thelatter communicating with the conduit 42 in the side of the casing 10and passing through the condenser chamber 34 to an annular intakechamber 13 surrounding the lower portion of the cylinder 11 andsurrounded by the cooling jacket 29. Ports 44 in the wall of thecylinder 11 admit the refrigerant from theintake chamber at?) to thecylinder 11 when the piston 12 is at the lower extremity of its strokewhile one or more similar ports in the cylinder 11 are uncovered by thepiston 12' when elevated for admitting the refrigerant into the crankchamber 15.

A block 46 secured to the upper end of the cylinder 11 has a slidablymounted head 47 for the upper end of the cylinder 11 movable withinacha'mber' 48 of said block 46, while a spring 49 bears upon the-head 47normally maintaining the same in its closed position upon the :cylinder11. v

A relief valve 50 in the top of the piston 12 is normally held closed'bya spring 51 and --adapted1foropening during the down.- ward stroke ofthe piston 12 for admitting refrigerant tothe cylinder 11 above thepiston and thereby relieving a'tendency toward thecreating of a vacuumby the'descending .piston. The compressed refrigerant leaves the'cylinder block 46through a passage 52 and passes by means of a pipe 53through the cooling chamber 29 outwardly of the top 33=ofthe casing 10and thence to the annular chamber 54 in the upper portion of an oilseparator 55'secured to the casing 10 at the opposite side thereoffromthe separator receiver, 23, 25.

Any oil in the refrigerant may pass through a port 56 into a centralbore 57 of the separator 55 and into the bottom cham- .berf58 thereoftobe readily removed by detaching the bottom plug 59 of the separator55. The refrigerant passes from the chamber54 through registering ports60 and 61 in the adjacent sides of the separator 55 and casing 10respectively and enters thecondenser chamber 34 in its compressedcondition for coolmgby the-water jacket 29. The

passing of the refrigerant outwardly of the condenser chamber 34 throughthe receiver chamber 27 and the pipe 37 to. the expansion valve hasjbeenalready noted. -An indicator ,62 upon the top 40 of the scale separator23denotes the pressure of the incomin refrigerant from theexpans1oncoils,w ile a similar indicator 63 centrallyof the top of theoil separator 55 in communication with the bore-57 thereof by theT-fitting 53f shows the degree of pressure that has been placed upon therefrigerant by the piston12 and ready for condensation and passingthrough the expansion valve. A stuflingbox 64 is preferably pro- 7 videdin the casing top 33, for the outlet pipe 53 of therefrigerant. Studbolts-65 may be provided for securing the top 33 upon the'casi'ng 10while a removable plate 9 may beprovided at the side of the casing 10foriconveniencein obtaining access to the interior Working parts-of themachine.

.The complete operation of the invention will'b'efully understood fromthis detailed description thereof, the compressor inclosed within thecondenser and a single water jacket for cooling both the compressor andcondenser being of primary importance, while the scale separator withits receiver for the outgoing refrigerant is a further advantageousarrangement as well asthe oil separator 55 oppositely positioned withrespect thereto. The normally closed valve 50 of the piston 12 relievingany vacuum in the cylinder 11 has in cooperation the supplying ofrefrigerant through the port 45 to the crank chamber 15 to replace there frigerant taken out of the crank case through said relief valve 50.The motor being automatically controlled for operating the piston 12when it is desired to start the circulation of the refrigerant, themanncr of circulating the refrigerant for the refrigerating system willbe apparent, the degree of compression attained by the compressordepending somewhat upon the force of the piston 12 compared with thestrength of the spring 49 in normally maintaining the cylinder head 47closed.

While the form of the invention herein is believed preferable, it willbe understood that minor changes may be made therein without departingfrom the spirit and scope of my invention.

What I claim as new is 1. A refrigerating apparatus con'iprising acasing having an axially positioned compression cylinder therein withthe lower portion of the casing providing a. crank chamber for thecylinder, an annular wall surrounding the cylinder within the casingforming a condenser chamber between the wall and casing and a coolingchamber for both the condenser chamber and cylinder between said walland cylinder, an operating piston within the cylinder and means ofcommunication for the refrigerant between the cylinder and condenserchamber.

2. A machine comprising a chambered casing, a compressor cylinder withinthe casing, a wall around the cylinder forming an intake chamber for therefrigerant with sets of ports through the cylinder wall adapted foradmitting refrigerant to the cylinder at diiferent elevations and arecipcasing, communicating means for the compressed refrigerant betweenthe top of the casing and the said outer chamber, outlet and inlet pipesfor the refrigerant carried by the casing and outlet and the coolinwater.

4. A refrigerating machine comprising a casing, a compressor cylindertherein, a normally resiliently closed valve head for the cylinder, areciprocating piston within the cylinder, a resiliently normally closedrelief valve in the top of the piston adapted for opening during thedownward stroke of the latter whereby the refrigerant is admitted to thecylinder for compression during the return stroke of the piston.

5. A refrigerating machine comprising a casing, having an annularcondenser chamber therein, a cylinder, centrally within the casingforming a cooling jacket between the cylinder and condenser chamber, areciproeating piston within the cylinder, communicating means betweenthe cylinder and condenser chamber, a combined scale separator andliquid receiver carried by the casing adapted to conduct the incomingand outgoing refrigerant therethrough and conducting means for thecooling water through the liquid receiver in communication with thecooling jacket.

6. A machine comprising a casing, a compresser cylinder axially therein,a condenser chamber jacketed within the casing outwardly of the cylinderwith a water cooling chamber therebetween, a block upon the cylinderhaving a chamber therein and an outlet passage from said block chamber,a head within the chamber of the block norinlet pipes for mallyresiliently seated closed upon the top 7. A machine comprising a casing,a com pressor cylinder axially therein, a. condenser chamber jacketedwithin the casing out wardly of the cylinder with a water coolingchamber therebetween, a block upon the cylinder having a chamber thereinand an outlet passage from said block chamber, a head within the chamberof the block normally resiliently seated closed upon the top of thecylinder, a reciprocating piston within the cylinder, a normally closedrelief valve in the top of the piston, means for operating said piston,an intake chamber surrounding the cylinder adapted to receiverefrigerant from the expansion coils of the system and being incommunication with the interior of the cylinder at difierent elevationsfor admitting refrigerant into the cylinder both above and below thepiston during alternate reciprocations thereof, a. casing at one side ofthe machine having a "scale separator chamber in its upper end receivingthe incoming refrigerant and being in communication with said intakechamber, the said side casing having a receiver in its lower portioncommunicating with the condenser chamber adapted for outletting therefrigerant to the expansion valve, an oil separator upon the casingcommunicating with the condenser chamber and a pipe communicatingbetween the outlet passage of the block chamber and the interior of theoil separator, whereby the refrigerant passes JOSEF ELLMAUER.

